As the densities go up, the distance to the closest females is shortened, so you don't have to have a song of high amplitude.

当蓝鲸分布密度上升，他们距离附近的母鲸的距离缩短，就无需高歌了。

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Amplitude: the biggest distance that object leaves equilibrium position.

振幅：振动物体离开平衡位置的最大距离。

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Numerical results show that the squeezing ratio decrease at some initial distance when the amplitude increase and the squeezing was best if pluse wave shape near fundamental soliton.

数值结果表明，增大初始振幅在初始一定距离范围内能减小压缩比，接近理想光孤子的脉冲波形压缩效果最好。

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So, sometimes people get confused when they're solving problems and call the amplitude this distance all the way from the max to the min but it's only half of that because we're only going back to the average level.

解题的时候会弄错，把这个从,最大值到最小值的距离,叫做幅值，但实际上,只有它的一半,只是它和平均值的差距。

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